The original muscle car and John DeLorean was part of its development. It was so popular that it inspired a hit song:
You’re really lookin’ fine
Three deuces and a four-speed
And a three-eighty-nine – “Little GTO” by Ronnie & The Daytonas
The GTO was not a novelty but a legit performance car with a Tri Powered 389ci V8 that produced a factory-rated 360hp and you transmission options of a two-speed automatic or a four-speed manual.